ANNOTATED LIST OF THE SPECIES 129 
Genus 40: HYPODORAS Eigenmann 
Hypodoras Eigenmann, 1925, Trans. Amer. Phil. Soc., XXII, 329. 
Type: Hypodoras forficulatus Eigenmann 
Iquitos 
Readily distinguished by the large rhomboidal plate over the anterior two 
thirds of the adipose; air bladder reniform, without coeca, constricted longitu- 
dinally, the constriction prolonged into the posterior lobe, which is forked in its 
posterior three fifths; dorsal spine grooved and hookless; adipose little shorter 
than the anal and not keeled in an anterior direction; lateral scutes in contact 
with the plates above and below, and with a single hook; those forward of the 
peduncle with two to five hooks above and one or two below; humeral process 
very strong and spiniferous; eye just before middle point of head. 
Iknown only from the type, one specimen. 
85. Hypoporas FORFICULATUS Eigenmann 
Hypodoras forficulatus Eigenmann, 1925, Trans. Amer. Phil. Soc., XXII, 330, pl. iv, fig. 1; pl. xxv, 
fig. 3; text fig. 12, I. 
15876, 1, type, 123 mm., Iquitos, Allen, September, 1920. 
Sole species and sole specimen of the genus. 
Genus 41: PHYSOPYXIS Cope 
Physopyxis Cope, 1871, Proc. Acad. Nat. Sci. Phila., XXTIT, 112, 272; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 220; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 392; 
EFigenmann, 1925, Trans. Amer. Phil. Soc., XXII, 330. 
Type: Physopyxis lyra Cope 
Known only from one specimen of the one species, from the Rio Ambyiacu 
collections. 
Devoid of adipose; coracoid processes lyriform, much larger than humeral 
processes which do not reach to first lateral scute; caudal rounded; eye small and 
in forward half of head; serrae present on proximal half of anterior border of 
dorsal fin; pectoral spine overlapping origin of anal; extensive buckler consisting of 
coracoid and clavicles. 
86. PHysopyxIsS LYRA Cope 
Physopyxis lyra Cope, 1871, Proc. Acad. Nat. Sci. Phila., XXTIT, 112, 272, figs. la-le, Rio Ambyiacu; 
Jigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 220; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 392; 
Eigenmann, 1925, Trans. Amer. Phil. Soc., XXII, pl. xvi, figs. 1 and 2; text fig. 22. 
